Re: Dobsonian Aperature Question

Dennis,
I am exactly where you are. Jon brought up some very good points about size,
but I am still unsure about how much of a difference the 2" makes. If it is
the difference between spiral and no spiral as you mentioned, then the size
would be an after thought for me. But if the 2" is just added brightness,
then the size would not be worth it, plus the money. Then I would have to
save for something larger in the future, or just go the CCD route. If anyone
can explain this, it would be a big help. Thanks!



"Dennis Woos" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> "MrWizer" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
>
> We have a 10" f/5.6 dob which provides very nice views, and with a dark
sky
> the spiral structure of M51 is just detectable.  M33 shows some mottling,
> but no spiral.  I would find the 12" compelling if it clearly showed
spiral
> on either or both of these.  Unfortunately, I don't know the answer to
this,
> but I would bet it doesn't.  If the 12" doesn't, then I would get the 10"
> and dream about a 15", which I know does the job.
>
> Dennis
>
>